I personally have to give a definite yes, depending on what you plan to run with it. Higher impedance cans, probably not. Lower impedance cans or IEM's, definitely. It's actually my go to portable amp for my Westone 4's, despite owning an RSA SR-71A and auditioning a Pico Slim. The SR-71A drives my Denon D5000's better mind, my guess is because the two 9v batteries offer more juice compared to the JDS cMoyBB's one, but I'll report back in more detail after further testing.
But to the JDS cMoy's defence, I honestly feel it has one of the best soundstages available from a portable amp, even compared to the SR-71A and Pico Slim. It offers a really nice, open presentation with better instrumental separation and imo more low end bass. It doesn't have "boomy bass" unless you flip the bass boost switch (which I personally don't like to use).
Also, where are you seeing it for $90? It's $60 straight from the JDS site, where you can tell him which phones you plan to use them with so he can customise for that impedance too.